题目内容

具有氧化性的货物,在包装时应使用有机材料作为衬垫。

A. 正确
B. 错误

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In boilers, besides maintaining the burner atomizers, air diffuser vanes, fuel temperature, forced draft fan, fuel pump and other hardware in good condition, there are some adjustments on the ()that can produce a good flame for the most efficient operation.

A. fuel-air ratio
B. compression ratio
C. fuel rack
D. viscosity index

亚当斯身高多少?

MWR-J220/5模块是()模块。

下列属于比率变量的是()

A. 人的血型
B. 五级记分制
C. 气温
D. 身高

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